US 11,457,407 B2Granted

Reliable multicast/broadcast transmission scheme

AssigneeHewlett Packard Enterprise Development LP

InventorsQiang Zhou, Jianpo Han, Guangzhi Ran

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Abstract

In one example a computer implemented method comprises receiving, at an access point of a wireless network, a multicast/broadcast frame which identifies one or more stations associated with the access point as a recipient for the multicast/broadcast frame, and in response to a determination that at least one station of the one or more stations identified as a recipient for the multicast/broadcast frame is in an inactive state, determining a beacon slot time for a transmission of the multicast/broadcast frame from the access point, in response to a determination that at least one of the one or more stations in an inactive state will miss the beacon signal, converting the multicast/broadcast frame to a unicast frame, and holding a copy of the unicast frame to be transmitted to the at least one of the one or more stations in an inactive state that will miss the beacon signal.

Claims18

Dependent claims

A controller, comprising:

a processor;
and
a memory communicatively coupled to the processor and comprising instructions which, when executed by the processor, configure the processor to perform operations, comprising:
detecting, at an access point of a wireless network, a multicast/broadcast frame buffered for transmission from the access point;
determining a beacon slot time for a transmission of the multicast/broadcast frame from the access point, wherein the beacon slot time is determined based at least in part on a Delivery Traffic Indicator Map (DTIM) parameter;
determining that a first station of one or more stations is a ReceiveDTIM enabled station, wherein the first station is in an inactive state;
in response to the determination that the first station is in the inactive state and will miss a beacon signal, scheduling a wake up slot time for the first station and the beacon slot time for the transmission of the multicast/broadcast frame, wherein the beacon slot time is before the wake up slot time;
in response to a comparison that determined that the beacon slot time is before the wake up slot time:
converting the multicast/broadcast frame to a unicast frame;
holding a copy of the unicast frame to be transmitted to the first station in the inactive state that will miss the beacon signal;
and
during the wake up slot time, transmitting the unicast frame from the access point to the first station;
and
in response to (i) a determination that the first station is the ReceiveDTIM enabled station and (ii) the comparison that determined that the beacon slot time is after the wake up slot time associated with the first station, transmitting the multicast/broadcast frame to the first station during the beacon slot time.

11 more elements

A computer-implemented method, comprising:

detecting, at an access point of a wireless network, a multicast/broadcast frame buffered for transmission from the access point;
determining a beacon slot time for a transmission of the multicast/broadcast frame from the access point, wherein the beacon slot time is determined based at least in part on a Delivery Traffic Indicator Map (DTIM) parameter;
determining that a first station of one or more stations is a ReceiveDTIM enabled station, wherein the first station is in an inactive state;
in response to the determination that the first station is in the inactive state and will miss a beacon signal, comparing a wake up slot time scheduled for the first station and the beacon slot time for the transmission of the multicast/broadcast frame, wherein the beacon slot time is before the wake up slot time;
in response to the comparison that determined that the beacon slot time is before the wake up slot time:
converting the multicast/broadcast frame to a unicast frame;
holding a copy of the unicast frame to be transmitted to the first station in the inactive state that will miss the beacon signal;
and
during the wake up slot time, transmitting the unicast frame from the access point to the first station;
and
in response to (i) a determination that the first station is the ReceiveDTIM enabled station and (ii) the comparison that determined that the beacon slot time is after the wake up slot time associated with the first station, transmitting the multicast/broadcast frame to the first station during the beacon slot time.

8 more elements

A non-transitory computer-readable medium comprising logic instructions which, when executed by a processor, configure the processor to perform operations comprising:

detecting, at an access point of a wireless network, a multicast/broadcast frame buffered for transmission from the access point;
determining a beacon slot time for a transmission of the multicast/broadcast frame from the access point, wherein the beacon slot time is determined based at least in part on a Delivery Traffic Indicator Map (DTIM) parameter;
determining that a first station of one or more stations is a ReceiveDTIM enabled station, wherein the first station is in an inactive state;
in response to the determination that the first station is in the inactive state and will miss a beacon signal, comparing a wake up slot time scheduled for the first station and the beacon slot time for the transmission of the multicast/broadcast frame, wherein the beacon slot time is before the wake up slot time;
in response to the comparison that determined that the beacon slot time is before the wake up slot time:
converting the multicast/broadcast frame to a unicast frame;
holding a copy of the unicast frame to be transmitted to the first station in the inactive state that will miss the beacon signal;
and
during the wake up slot time, transmitting the unicast frame from the access point to the first station;
and
in response to (i) a determination that the first station is the ReceiveDTIM enabled station and (ii) the comparison that determined that the beacon slot time is after the wake up slot time associated with the first station, transmitting the multicast/broadcast frame to the first station during the beacon slot time.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/547,183Filed 21 Aug 2019
Published: US 2021/0058861 A125 Feb 2021
Granted: 27 Sep 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H04W 52/0216
Managed by the network, e.g. network or access point is leader and terminal is follower: using a pre-established activity schedule, e.g. traffic…
H04L 12/1868
Comprising mechanisms for improved reliability, e.g. status reports: measures taken after transmission, e.g. acknowledgments
H04L 12/1881
For broadcast or conference , e.g. multicast: with schedule organisation, e.g. priority, sequence management
H04W 72/30
Local resource management: resource management for broadcast services